Method and apparatus for molding heel lifts



Nov. 10, 1953 A. A. R|zzo METHOD AND APPARATUS FOR MOLDING HEEL LIFTSOriginal Filed Jan. 5, 1949 Awthong ARizzo,

Patented Nov. 10, 1953 METHOD AND APPARATUS FOR MOLDING HEEL LIFTSAnthony A. Rizzo, East Cleveland, Ohio, assignor of one-fifth to JamesJ. Lazna, Cleveland Heights, Ohio,

Original application January 5, 1949, Serial No. 69,298. Divided andthis application November 4, 1949, Serial No. 125,561

6 Claims.

1 My invention relates in general to the manufacture of thin heel or toplifts or similar articles of the type having an integral attachment clipmolded therein. More particularly, my invention relates to methods andapparatus for manufacturing such type heel lifts or similar articles.

The present application is a division of my co-v pending applicationSerial No. 69,298, filed J anuary 5. 1949.

It has been proposed heretofore to provide heel lifts with integralpronged attachment clips molded therein for securing it to a shoe heel.In the manufacture of such type heel lifts, however, it has been adifficult problem to prevent the formation of stock flashing or astocking of the molding compound on the projecting portions of the clipprongs or nails, which flashing, if left on the clip nails, is apt toprevent the lift from being properly flattened down in place on the shoeheel and besides, detracts from the appearance of the finished lift.Moreover, the formation of such flashing on the projecting prongsinterferes with the production manufacture of such lifts, and thesubsequent removal of the flashing from the prongs entails an additionalmanufacturing operation which adds to the cost of the finished article.

It is an object of my invention, therefore, to provide improved methodsof molding heel lifts with pronged attachment clips embedded thereinwhereby the clips will be uniformly positioned in the lifts and theprotruding portions of the clip prongs will be substantially free of anystock flashing thereon.

Another object of my invention is to provide novel apparatus foreffectively molding a heel lift of the above described character Withthe protruding portions of the clip prongs substantially free of anystock flashing.

Further objects and advantages of my invention will appear from thefollowing description of a species thereof and from the accompanyingdrawing in which:

Fig. 1 is a perspective and Fig. 2 a plan view of a heel lift comprisingmy invention; Fig. 3 is a section on the line 33 of Fig. 2 Fig. 4 is anenlarged perspective view of the insert attachment clip for the liftshown in Figs. 1-3; Fig. 5 is an enlarged fragmentary sectional view ofthe said clip; Fig. 6 is a fragmentary sectional view of a moldaccording to the invention for molding the heel lift of Figs. 1-3 withthe attachment clip thereof shown in position within the mold; Fig. '7is a plan view of the said mold; Fig. 8 is a fragmentary sectional viewof a modified form of mold construction and Fig. 9 is a fragmentarysection of the modified heel lift formed by the said mold; Fig. 10 is afragmentary sectional view of another modified mold construction formolding the heel lift in accordance with a modified method comprising myinvention; Fig. 11 is a fragmentary section through one of the nails ofa modified form of clip according to the invention; Fig. 12 is afragmentary sectional view of still another modified form of mold andclip construction according to the invention; and Fig. 13 is afragmentary section of the modified heel lift formed by the mold of Fig.12.

Referring to Figs. l-3 of the drawing, the heel lift there showncomprises a conventionally shaped lift body It) made of any of thewellknown heel lift compositions, such as hard rubber, fibre, plastic ora molded fiber-rubber composition, for instance. lift body 10, inaccordance with standard practice, is arched to provide a slightlycupped or concave attachment face II which serves to insure the liftedge portions fitting tight against the shoe bottom when the lift isfastened in place thereon.

The lift body I0 is provided with integral attachment means comprising ametal insert clip I2 molded in the body In for attaching the lift to theheel of a shoe. As shown in Fig. 4, the clip I! comprises a thin plateor base portion l3 of suitable metal, such as mild steel havin athickness around 3. 2 or so. The said plate portion l3 of the clip isprovided with a plurality of parallel prongs or nails M which extendfrom the plate portion perpendicularly to the plane and from the sameside thereof, and in accurately spaced relation to each other. In theparticular case illustrated, the plate portion [3 of the clip ispreferably made of triangular shape in order to minimize waste of thestrip stock from which the plate blanks are punched and thus reduce thecost of manufacture. The plate [3 is provided with three nails or bradsM which are secured to the plate adjacent the corners thereof and spacedin substantially the same position relative to each other as thecustomary nail-receiving apertures in conventional type lifts. The nailsH are preferably provided with serrations, grooves or other surfaceirregularities, as indicated at l5, for the purpose of providing abetter grip with the shoe heel.

While the nails I4 may be secured to the plate l3 in any suitable way,as by welding or clamping, they are preferably riveted in place to theplate l3, the latter being clamped between upset As shown in Fig. 3, the

3 rivet collar portions I6 and rivet head portions I! of the nails. Inthe form of clip shown in Figs. 1-4, the upset rivet collars I6 of thenails I4 are formed with substantially flat annular under faces orshoulder surfaces I9 (Fig. which completely encircle the bases of theclip nails I4 and which all lie in a common plane and serve as bearingor seating surfaces for resting against the fiat tops of upstandingbosses in the liftforming mold. The shank portions of the nails I4 aresimilar to the shank portions of the conventional type nails or brads incommon use at present for attaching heel lifts in place on shoe heels. Aheel lift having attachment prongs in the form of such type nails willnot split a smallsize wooden shoe heel when applied thereto. Nails ofcircular cross-section are preferred for the reason that they simplifythe construction of the mold which is employed for molding the lift.

However, nails of square or rectangular crosssection may be usedinstead, if desired. Clips I2 of the particular type illustrated aresimple to manufacture and can be made quickly and very inexpensively bymachine, the nails I4 being riveted to the plate I3 while held in a jigso as to assure accurate positioning of the nails relative to eachother. Such accurate positioning of the nails I4 is essential to theproper molding of the clip into the lift body III in accordance with themethod of the invention.

As shown in Fig. 2, the clip I2 is molded more or less centrally withinthe lift body In with the nails I4 projecting outwardly from the cuppedattachment face II of the lift body and preferably located insubstantially the same position about the lift body (as viewed in plan)as the customary nail-receiving apertures in conventional type lifts.The nails I4 project outwardly beyond the cupped face II a distancesufficient to insure a secure attachment of the lift to the shoe heel.For this purpose, I have found a nail projection of around 1 5" or sobeyond the face I I to be entirely satisfactory.

The plate portion I3 of the clip is preferably molded in the lift bodyI0 as close as possible (for instance around 1%" or so) to the cuppedattachment face II thereof in order to provide the maximum possiblethickness of lift body material on the tread side for wear purposes. Tomore firmly secure the clip I2 in place within the body III of the liftand to also facilitate the flow of the molding compound underneath theplate portion I3 of the clip, one or more apertures I8 may be provided,if desired, in the said plate portion I3. In such case, three suchapertures I8 of circular shape may be provided, the said apertures beingarranged in triangularly spaced relation with each aperture locatedapproximately midway between a respective pair of the nails I4. In thisway, a continuous web of metal is retained extending from the center ofthe plate portion I3 out to the region of each nail I4 for effectivetransmission thereto of the force of the hammer blows to which the liftis subjected during its attachment to the shoe heel.

The molding of the heel lift, shown in Figs. 1-3, is performed in a mold(Figs. 6-7) having a cavity 2I shaped to conform to the configuration ofthe lift body Ill. The bottom 22 of the mold is provided with aplurality of upstanding apertured bosses 23 corresponding in number(three in the particular case shown) and in disposition with the nailsI4 of the clip I2, and having central apertures 24 to receive the nailsI4. The bosses 23 are made around $43" or so larger in diameter than thenails I4 of the clip. In the particular case illustrated wherein thenails are of 0.054" diameter. the bosses 23 are of around diameter orthereabouts. The bosses 23 are preferably formed by the projectingreduced-diameter upper end portions of bushings 25 which are received inrecesses 26 in the mold cavity bottom 22. The bushings 25 are suitablysecured in place in the mold recesses 26, such as by having a press fittherein. The central passageways through the bushings 25 form thenailreceiving apertures 24, and the mold recesses 26 are formed withreduced diameter portions 21 extending downwardly beyond the bushings 25to thereby accommodate the lower ends of the nails I4 and to alsoprovide positioning shoulders 28 for the bushings. By means of thepassageways 21, the bushings 25 may be knocked out of the recesses 26for replacement purposes. The bosses 23 project above the mold cavitybottom 22 the distance 1%" or so) that the body portion I3 of the clipis to be spaced inwardly from the attachment face II of the lift bodyIII.

The flat underfaces or shoulder surfaces I9 of the upset rivet collarson the nails I4 rest on the flat tops or rims 29 of the mold bosses 23to thereby properly space and position the clip I2 from the mold cavitybotom 22 and prevent tilting of the clip during the molding operation,and also to completely seal or close-01f the bushing apertures 24 fromthe mold cavity. Preferably, the mold cavity bottom 22 is provided withan additional upstanding center support pin 30 (or more than one suchpin especially in the case of larger-sized clips for larger-sized heellifts) to prevent buckling or downward bending or bowing of the centersection of the clip plate portion 53 by the pressure of the moldingcompound during the molding operation such as would tip or lift andunseat the portions of the nail seating shoulders I9 furthest removedfrom the center of the clip off the top surfaces of the bushings 25,with resultant disruption of the seal therebetween which would thenpermit the compressed molding compound in the mold to flow through theseparations or gaps between the shoulders I9 and the tops 29 of thebushings 25 and down into the bushing apertures 24 and around the nailsI4 therein where it would form stock fiashings in the form of skirts orsleeves on the said nails. The nail-receiving apertures 24 in thebushings '25 are preferably made of slightly larger diameter or size(for instance .008" or so larger diameter) than the nails I 4 so as topermit easy removal of the finished heel lift from the mold. The wallsof these apertures 24 serve to center the clip I2 within the mold 20 andprevent lateral shifting of the clip during the molding operation.

In molding the heel lift, shown in Figs. 1-3, the clip I2 is firstproperly placed in the mold 20 by inserting the nails I4 thereof downinto the corresponding mold apertures 24 until the flat annular seatingshoulders I9 on the upset portions I6 of the nails engage and rest onthe tops or rims 29 of the bosses 23. A quantity of the molding compoundis then placed in the mold 20, after which the movable pressure or topplate II of the mold assembly is lowered to close the mold assembly andthereby compress the molding material while the mold is subjected toheat. Due to the fact that the upset collar portions I6 of the clipnails I4 rest against, and are in addition forced against the tops 29 ofthe mold bosses 23 by the pressure of the molding compound acting on theplate portion I3 of the clip, an effective seal is formed therebetweencompletely around the nails I4 which thus completely closes off thebushing apertures 24 from the mold cavity 2| and serves to prevent theleakage or flow of the highly compressed molding material down aroundthe shank portions of the nails to form a skirt or flashing thereon.After the required interval of time during which the molding material inthe closed mold has been subjected to heat and pressure, the movable topplate 3| is lifted away from the mold 2|] and the finished heel liftthen removed from the latter.

The upwardly projecting or boss portions 23 of the bushings 25 produce,in the body portion ID of the finished heel lift, circular recesses 32forming an annular space, groove or hollow (Figs. 1 and 3) around thebase or upset end of the shank of each clip nail M, the said annulargroove having a. width of the order of or so, or in other words, anoutside diameter (around 1 3'") which is A3" or so greater than thediameter of the nails I4. This annular hollow 32 around each nail I4provides adequate space into which any stock flashing that may for somereason be formed on the nails, may flow when the heel lift is applied toa shoe heel, thus preventing the gathering or bunching up of such stockflashing between the attachment face II of the lift body I!) and thecorresponding surface of the shoe heel such as would otherwise preventthe lift from being completely flattened down against the shoe heel andthereafter remaining thus flattened thereagainst.

nI order to produce, particularly in the case of thin heel lifts,grooves or recesses 32 of the deepest possible depth while maintainingthe plate portion I3 of the clip as close as possible to inch or so)from the atachment face II to thereby provide maximum thickness of liftbody material on the tread side for wear purposes, the upset rivetcollars I6 on the clip nails I4 are made as thin as possible, forinstance, of the order of thickness of the plate portion I3 or less, 1.e., from to & inch thick or thereabouts, preferably around A inch. Tospace the plate portion I3 of such a clip I2 a distance of around or soinwardly from the attachment face II of the lift, the upstanding bosses23 in the mold cavity 2| should have a height of from 1% to & inch orthereabouts. Such height bosses 23 produce annular grooves or recesses32 in the lift body It having a depth of the order of 1 s to inch.Grooves or recesses 32 of such an indicated depth and having a widthapproximating that previously indicated, (i. e., 1 3'"), provide amplespace for completely receiving therein any small amount of stockflashing that may for some reason form on the clip nails I4 during themolding of the lift in accordance with the invention. Moreover, any suchstock flashing as might thus actually form on the clip nails l4 may,because of the location of its point or origin at a distance inwardlyfrom the attachment face actually terminate wholly within the confinesof the recesses 32 so as not to project outwardly beyond the attachmentface II and thus present an unsightly appearance or prevent theobtaining of a secure attachment of the lift to a shoe heel.

Fig. 8 illustrates a modification of the invention wherein upstandingbosses 33 of frustoconical shape are employed in the mold 20. Suchshaped bosses produce outwardly flaring circular recesses 34 (Fig. 9) inthe lift body I0 around the bases of the nails I4, which may bepreferable from an appearance standpoint to the cylindrical receses 32formed by the bosses 23.

Such flaring recesses 34 also provide increased space into which anyflashing on the nails I4 may flow during the attachment of the lift to ashoe heel. In addition, the frusto-conical bosses 33 are sturdier thanthe bosses 23 and thus are better able to withstand the relatively highpressure applied thereto by the clip I2 during the molding operation.

Figs. 10 and 11 illustrate a modification of the invention wherein thinwashers 35 of suitable resilient or yieldable material, such as softrubber for instance, are fitted over the clip nails I4 and abuttedagainst the upset collar portions I6 thereon to thereby form resilientfacings or seating surfaces for engagement with the tops 29 of the moldbosses 23. Because of their yieldable character, the resilient washerfacings 35 serve to more positively assure and maintain the effectiveseal-off of the nail-receiving apertures 24 form the mold cavity itselfduring the molding operation.

As shown in Fig. 10, the effective seal-ofi of the nail-receivingapertures 24 in the mold either by the resilient washers 35 as in Fig.10, or by the upset collars I6 on the clip nails I4 as in Fig. 6, can bepositively assured in any case by providing the pressure or top plate 36of the mold with a plurality of depending hold-down or pressure pins 31corresponding in number to and respectively positioned directly over themold bushings 25. These pins are vertically movable in the pressureplate and are arranged to engage and to be forcefully pressed down orclamped against the rivet heads I! ofthe clip nails by any suitablemeans (not shown), such as a toggle arrangement for instance, eitherbefore or during the lowering of the top plate 36 but in any event priorto any compression of the molding material in the mold cavity, thepressure of the pins serving to forcefully press and hold the resilientwashers 35 or the upset collars I6, as the case may be, down tightagainst the tops of the mold bosses 23. Such depending pressure pins 31will, of course, leave openings in the tread face of the finished liftwhich, if not desirable, may be eliminated by resorting to a two-stagemolding process such as is used at present in the manufacture ofconventional type heel lifts having metal washers molded therein. Inthis modified method according to the invention, only sufficient moldingmaterial (1. e., a portion only of the normal full charge) is initiallyplaced in the mold 20 to eventually imbed just the clip I2 or at leastthe collars I6 (e. g., up to the dotted line A in Fig. 10), and then atop pressure plate such as is used at present in the first stage of themolding of conventional type lifts having metal washers imbeddedtherein, but provided in addition with hold-down pins similar to thepins 31 in Fig. 10, is then lowered into the mold cavity 2| to cause thehold-down pins 31 to first engage and forcibly press or clamp down onthe nail heads I! and then subsequently compress the molding compoundwithin the mold cavity 2|. The engagement of the hold-down pins 31 ofthe pressure plate with the nail heads I! of the clip |2 prior to thecompression of the molding compound in the mold cavity by the pressureplate, assures the positive seal-off of the nailreceiving apertures 24from the mold cavity 2| (by the pressure engagement of the resilientwashers 35 or the upset collar portions I6 of the nails I4 with the tops29 of the bosses 23) before the compression of the molding compound inthe mold cavity reaches a degree such as would tend to force it throughany minute separation or gap between the tops of the bosses 23 and therubber washers or nail collars l6, and thus down into the bushingapertures 24. Upon completion of this first molding step, the lift isthen completed in the same manner as is used at present in the moldingof conventional type lifts, i. e., by inserting in the mold cavity 2| anadditional quantity of molding compound sufflcient to form the second orfinal layer of the lift body III and then lowering a conventional typepressure plate 3| (1. e., one without any hold-down pins) to close themold assembly and from the finished lift body ill. Obviously, instead ofusing two differently constructed pressure plates for the two moldingstages of this modified molding process, a single pressure plate ofsuitable form may be employed for both steps, in which case thehold-down pins 31 are withdrawn into the plate so as to be flush withthe underside thereof during the second stage of the molding process.

In the modification illustrated in Fig. 12, the clip prongs or nails 38are provided with upset collars 38 of rounded or spherical form, and themold bosses are provided with cupped or spherical recesses orcountersunk sockets 4| in their upper ends concentric with the bushingapertures 24, within which recesses the rounded collars 39 seat to sealand close off the bushing apertures 24 and bosses 40. The roundedcollars 39 and seats 4| function in the manner of a ball and socketconnection to allow the rounded collars to rock in the cupped seats andthus assure an effective seal or closing-off of the bushing apertures 24from the mold cavity 2| at all times during the molding operationdespite any slight tilting of the clip plate 13 at the bosses 40 whichmight result from the downward bending or bowing of the clip plate bythe pressure of the molding compound thereagainst during the moldingoperation. Such downward bending and resultant tilting of the clip plateI3 is limited to a very small degree, moreover, by the upstanding centerpin 30, which is preferably provided in the mold cavity 2| for suchpurpose, and the ball and socket clip-supporting arrangement 39, 4|shown will effectively maintain, without difficulty, the seal-off of thebushing apertures 24 within such a limited range of tilting movement ofthe clip plate 13. The annular grooves or recesses 42 (Fig. 13) formedin the lift body I0 by the modified arrangement of Fig. 12 extendinwardly substantially to the plate portion l3 of the clips and, likethe recesses 32, are of ample size to accommodate therein any stockflashing that may by chance be formed on the clip nails 38. If desired,the use of hold-down pins 31 in the pressure plate of the mold, such asshown in Fig. 10, may be utilized with the modified clip and moldarrangement of Fig. 12.

The attachment of the heel lift, shown in Figs. l-3, to the heel of ashoe can be performed in a very simple, quick and convenient manner, i.e., merely by striking one or two hard and welldirected hammer blowsagainst the lift, over the region of the clip l2 therein, while the liftis held in place on the shoe heel. The hammer blows drive the clipprongs or nails l4 into the shoe heel and at the same time flatten thearched lift body 10 down against the shoe heel. Due to the absence ofnail apertures in its exposed or tread face, the heel lift, shown inFigs. 1-3, presents an extremely well-finished appearance when thusfastened in place on a shoe. Moreover, because of the particularconstruction of the clips l2 wherein the .plate portion 13 extends overand beyond the nails II, the force of the hammer blows is directed moreor less straight down through the nails, thus eliminating any splittingof the shoe heel in those cases where it is made of wood. The lift bodyIt being made of relatively stiff heel composition, the clip 12 willeffectively fasten the lift in place on the shoe heel so as not toseparate therefrom around its edges.

The molding of the heel lift, in accordance with my invention, is muchsimpler and cheaper than the molding procedure required to manufactureheel lifts of the conventional type having nail apertures therethroughand metal washers embedded therein. In molding such conventional typeheel lifts, a thin layer of molding compound is first pressed in themold, after which the metal washers are placed on top this first layerand a second layer of molding compound then molded on top of the firstlayer. With the heel lift, shown in Figs. l-3, however, it is merelynecessary to place the clip l2 in the empty mold, after which themolding of the entire lift body I0 can then be performed by a singlemolding operation.

What I claim as new and desire to secure by Letters Patent of the UnitedStates is:

l. A mold for molding a heel lift with a fastening clip insertcomprising a thin plate portion and a plurality of spaced parallelprongs projecting perpendicularly from one side of said plate portion,the said clip further having annular seating surfaces surroundingrespective prongs at their base ends, said mold comprising a bodyportion having a mold cavity the side walls of which conform to theconfiguration of the lift edges, a plurality of spaced bosses upstandingfrom the bottom of the mold cavity and provided with apertures forreceiving the clip prongs, the tops of said bosses comprising annularseating surfaces corresponding to the seating surfaces on the clip andon which the latter seat to position the clip in the mold and close offthe boss apertures from the mold cavity, and a pressure plate movableagainst the said mold body to close the mold, said pressure plate havinga plurality of hold-down pins therein corresponding to and aligned withthe said bosses of the mold body and longitudinally movable in saidpressure plate for clamping against the upper side of the fastening clipin the mold prior to complete closure of the mold.

2. A mold for molding a heel lift with a fastening clip insertcomprising a thin plate portion and a plurality of spaced parallelprongs projecting perpendicularly from one side of said plate portion,the said clip further having rounded annular seating shoulders at theunderside of the plate portion at the base ends of and surroundingrespective clip prongs, said mold comprising a body portion having amold cavity the side walls of which conform to the configuration of theleft edges, and a plurality of bosses upstanding from the bottom of themold cavity and provided with apertures for receiving the prongs, thetops of said bosses being formed with cupshaped sockets concentric withthe apertures in the bosses and in which the said rounded seatingshoulders of the clip seat to thereby close of! the said apertures fromthe mold cavity.

3. The method of molding an article having embedded therein a fasteningclip comprising a, plurality of prongs and continuous annular seatportions located at the bases of and concentrio with the said prongswhich method comprises, positioning the clip within the mold cavity withthe clip prongs received within apertures in the mold bottom and withthe annular seat portions of the clip seated against and completelyaround the rims of the said apertures to thereby close off the aperturesfrom the mold cavity, clamping the said annular seat portions of theclip tightly down against the said rims of the apertures in the moldbottom, introducing into the mold cavity a partial charge of moldingmaterial sufficient to completely imbed, when molded, the annular seatportions of the clip, subjecting the said partial charge of moldingmaterial to heat and pressure, while maintaining the said seat portionsclamped tightly down against the said rims of the said mold apertures,to thus completely imbed the said seat portions of the clip, opening themold and introducing into the mold cavity the remainder of the fullcharge of molding material for the lift, and then subjecting the saidremainder of the charge of molding material to heat and pressure withoutclamping the said seat portions down against the said rims of the moldapertures.

4. The method of molding an article having embedded therein a fasteningclip comprising a plurality of prongs and continuous annular seatportions located at the bases of and concentric with the said prongswhich method comprises, inserting over each of said prongs and seatingagainst the said seat portions a washer of yieldable material,positioning the clip within the mold cavity with the clip prongsreceived within apertures in the mold bottom and with the yieldablewashers on said prongs seated against and completely around the rims ofthe said apertures to thereby close off the apertures from the moldcavity, introducing a charge of molding material into the mold cavity,and then subjecting the said charge of molding material to pressure andheat.

5. A mold for molding a heel lift with a fastening clip insertcomprising a thin plate portion having a plurality of spaced parallelprongs projecting perpendicularly from one side thereof and havingspherically shaped seating shoulders at the underside of the plateportion at the base ends of and surrounding respective clip prongs, saidmold comprising a body portion having a 1o mold cavity the side walls ofwhich conform to the configuration of the lift edges, a plurality ofbosses upstanding from the bottom of the mold cavity and provided withapertures for receiving the prongs, the tops of said bosses being formedwith spherically shaped sockets concentric with the apertures in thebosses and in which the said.

spherically shaped seating shoulders of the clip seat to thereby closeoff the said apertures from the mold cavity, and supplementary supportmeans upstanding from the bottom of the mold cavity within the regionthereof bounded by said bosses for engagement with the plate portion ofthe clip to prevent buckling thereof during the molding operation.

6. A mold for molding a heel lift with a fastening clip insertcomprising a thin plate portion and a plurality of spaced parallelprongs projecting perpendicularly from one side of said plate portion,the said clip further having annular seating surfaces surroundingrespective prongs at their base ends, said mold comprising a bodyportion having a mold cavity, a plurality of spaced bosses upstandingfrom the bottom of the mold cavity and provided with apertures forreceiving the clip prongs, the tops of said bosses comprising annularseating surfaces corresponding to the seating surfaces on the clip andon which the latter seat to position the clip in the mold and close offthe boss apertures from the mold cavity, and a pressure plate movableagainst the said mold body to close the mold, said pressure plate havinghold-down means vertically movable therein to clamp down against theupper r side of the fastening clip in the mold prior to complete closureof the mold.

ANTHONY A. RIZZO'.

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